A preparation facility for a calcium sulfate-specific scale inhibitor
By designing interconnected reaction vessel facilities and multiple stirring methods, the problem of repeatedly removing and transferring intermediate reactants was solved, improving the production efficiency and quality of scale inhibitors. It is particularly suitable for the preparation of calcium sulfate scale inhibitors, achieving efficient and environmentally friendly production results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG DEAN ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-05-31
- Publication Date
- 2026-05-26
AI Technical Summary
In the production process of scale inhibitors, the repeated removal and transfer of intermediate reactants affects the ease of operation and leads to low production efficiency.
A preparation facility comprising a first, second, and third reactor was designed. Material communication is achieved through solenoid valves and rotating pipe joints. Combined with an ultrasonic disperser and magnetic stirring, the transfer and transportation of intermediates are simplified. The reactor is stably clamped by a clamping structure and an I-beam column, enabling convenient material transfer and homogenization reaction.
It improves the convenience and efficiency of scale inhibitor production, is particularly suitable for the preparation quality of products such as calcium phosphate, and is also applicable to the efficient preparation of calcium sulfate scale inhibitors. It has excellent environmental friendliness and biodegradability, high scale prevention rate, and reduces sludge volume and cleaning cycle.
Smart Images
Figure CN224271155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water treatment technology, specifically to a preparation facility for a calcium sulfate-specific scale inhibitor. Background Technology
[0002] Scale inhibitors are a class of agents that can disperse sparingly soluble inorganic salts in water, prevent or interfere with the precipitation and scaling of sparingly soluble inorganic salts on metal surfaces, and maintain good heat transfer performance of metal equipment.
[0003] Scale inhibitors can remove scale and prevent its formation, improve heat exchange efficiency, and reduce electricity or fuel consumption; water treatment can also reduce sewage discharge and improve water utilization.
[0004] From the perspective of its mechanism of action, scale inhibitors function in four parts: chelation and solubilization, coagulation and dispersion, electrostatic repulsion, and crystal distortion. Furthermore, in laboratory evaluation tests, dispersion is a remedy for chelation, and crystal distortion is a remedy for dispersion.
[0005] Based on their polymer composition, scale inhibitors can be divided into two main categories: natural polymer scale inhibitors and synthetic polymer scale inhibitors. Synthetic polymer scale inhibitors can be further divided into four types: carboxylic acid polymer scale inhibitors, sulfonic acid polymer scale inhibitors, phosphorus-containing polymer scale inhibitors, and environmentally friendly scale inhibitors.
[0006] The production of scale inhibitors involves multiple reaction vessels. When operating different reaction vessels, intermediate reactants need to be taken out of the reaction vessel and then added to a new reaction vessel, along with the addition of reaction raw materials, to carry out the reaction. This method requires multiple removals and transfers of intermediates, which affects the convenience of operation. Therefore, a special scale inhibitor preparation facility for calcium sulfate is proposed to optimize the scale inhibitor production process. Utility Model Content
[0007] The purpose of this invention is to provide a preparation facility for a calcium sulfate-specific scale inhibitor, in order to solve the problems mentioned in the background art.
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A facility for preparing a calcium sulfate-specific scale inhibitor includes a first reactor, a second reactor, and a third reactor arranged sequentially from top to bottom. A first cover plate is bolted to the top opening of the first reactor, a second cover plate is bolted to the top opening of the second reactor, and a third cover plate is bolted to the top opening of the third reactor. Each of the first, second, and third cover plates has a through hole for bolt penetration. The top openings of the first, second, and third reactors also have through holes for bolt penetration. A nut is threaded to the end of each bolt. A rotating through-hole is connected to the second cover plate. The reactor has a stirring shaft with stirring blades fixedly connected to its bottom end. A first solenoid valve is fixedly connected to the bottom surface of the first reactor. The first solenoid valve is fixedly connected to the top end of the stirring shaft via a first rotating pipe joint. The upper part of the stirring shaft has a cavity that extends into the second reactor and has a connecting hole around its circumference. A second solenoid valve is fixedly connected to the bottom surface of the second reactor. The second solenoid valve is rotatably installed with a third cover plate via a second rotating pipe joint. The first reactor is connected to the second reactor via the first solenoid valve, the first rotating pipe joint, the cavity, and the connecting hole. The second reactor is connected to the third reactor via the second solenoid valve and the second rotating pipe joint.
[0010] As a further embodiment of this utility model: an ultrasonic diffuser is fixedly installed on the first cover plate.
[0011] As a further embodiment of this utility model: a base is provided below the third reaction vessel, the bottom of the third reaction vessel is located inside the top of the base, a magnetic turntable is rotatably installed inside the top of the base, a magnetic rotor is provided inside the third reaction vessel, a first motor is fixedly installed inside the bottom of the base, and the output end of the first motor is fixedly connected to the magnetic turntable.
[0012] As a further improvement of this utility model, the bottom of the placement base is provided with heat dissipation holes.
[0013] As a further embodiment of this utility model: an extension bracket is fixedly connected to the rear side of the second cover plate, a second motor is rotatably mounted on the bottom surface of the extension bracket, a first synchronous wheel is rotatably mounted on the top surface of the extension bracket, the output end of the second motor is fixedly connected to the first synchronous wheel, a second synchronous wheel is fixedly connected to the outer side of the stirring shaft corresponding to the first synchronous wheel, and the second synchronous wheel is connected to the first synchronous wheel via a synchronous belt.
[0014] As a further embodiment of this utility model: an extension bracket is fixedly connected to the rear side of the first cover plate, the second cover plate, and the third cover plate; two clamps are symmetrically provided on the outer side of the first reactor, the second reactor, and the third reactor; anti-slip pads are fixedly connected to the inner side of each clamp; the rear end of the clamp is hinged to the hinge seat; the front end of the clamp is fixed by a fixing bolt; a nut is threaded to the end of the fixing bolt; a round hole for the fixing bolt to pass through is provided on the clamp; a connecting rod is fixedly connected to the back of the hinge seat; a slider is fixedly connected to the end of both the connecting rod and the extension bracket; the slider is slidably connected to an I-beam column that is adapted to it; the I-beam column is fixedly connected to the base plate; the base is fixedly connected to the top surface of the base plate; limit bolts are threadedly connected to both sides of the slider; threaded holes for threaded connection of the limit bolts are provided on the slider; positioning holes are provided at equal intervals on the I-beam column corresponding to the limit bolts; the positioning holes correspond to the limit bolts.
[0015] As a further improvement of this utility model, a discharge valve is fixedly connected to the bottom front side of the third reaction vessel.
[0016] As a further embodiment of this utility model: the top of the first reactor is symmetrically provided with two filling ports, and the top of the second reactor and the third reactor are each provided with a filling port. The end of the filling port is fixedly installed with a blind plate by bolts. Both the filling port and the blind plate are provided with round holes for bolts to pass through, and the end of the bolt is threaded with a nut.
[0017] As a further embodiment of this utility model, it also includes a front-end raw material processing device, which includes an acid hydrolysis stirring reactor, a purification centrifuge, a vacuum drying oven, and a high-temperature drying oven.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] The first reactor of this invention is connected to the second reactor via a first solenoid valve, a first rotating pipe joint, a cavity, and a connecting hole. The second reactor is connected to the third reactor via a second solenoid valve and a second rotating pipe joint. Thus, intermediates can be transferred and transported by opening the first and second solenoid valves without removing them, making material transfer more convenient and improving the production efficiency of scale inhibitors such as calcium phosphate.
[0020] This invention utilizes an ultrasonic disperser to perform ultrasonic dispersion in a first reaction vessel, and a first motor drives a magnetic turntable, which in turn drives a magnetic rotor to perform magnetic stirring in a third reaction vessel. Simultaneously, a second motor drives a stirring shaft, and stirring blades stir and homogenize the interior of the second reaction vessel, thereby enabling multiple reactions. This invention is particularly suitable for improving the quality of scale inhibitors such as calcium phosphate.
[0021] The first, second, and third cover plates of this utility model are connected to the I-beam column via an extension bracket. The first, second, and third reaction vessels are fixed by clamps, thereby stably clamping and fixing the first, second, and third reaction vessels to the I-beam column via a connecting rod. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of a facility for preparing a calcium sulfate-specific scale inhibitor.
[0023] Figure 2 This is a side cross-sectional view of a facility for preparing a calcium sulfate-specific scale inhibitor.
[0024] Figure 3 A front cross-sectional view of a facility for preparing a calcium sulfate-specific scale inhibitor.
[0025] Figure 4 This is a flow chart of a facility for preparing a calcium sulfate-specific scale inhibitor.
[0026] In the diagram: 1. First reactor; 2. Second reactor; 3. Third reactor; 4. First cover plate; 5. Second cover plate; 6. Third cover plate; 7. Ultrasonic disperser; 8. Stirring shaft; 9. Stirring blade; 10. First solenoid valve; 11. First rotary pipe joint; 12. Cavity; 13. Connecting hole; 14. Second solenoid valve; 15. Second rotary pipe joint; 16. Magnetic turntable; 17. Magnetic rotor; 18. Placement base; 19. First motor; 20. Extension bracket; 21. Second motor; 22. First synchronous pulley; 23. Second synchronous pulley; 24. Synchronous belt; 25. Clamp; 26. Anti-slip pad; 27. Hinge seat; 28. Fixing bolt; 29. Connecting rod; 30. Slider; 31. I-beam column; 32. Base plate; 33. Limit bolt; 34. Positioning hole; 35. Discharge valve; 36. Filling port; 37. Blind flange; 38. Switch. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figures 1-4In this embodiment of the invention, a scale inhibitor preparation facility for calcium sulfate includes a first reactor 1, a second reactor 2, and a third reactor 3 arranged sequentially from top to bottom. A first cover plate 4 is bolted to the top opening of the first reactor 1; a second cover plate 5 is bolted to the top opening of the second reactor 2; and a third cover plate 6 is bolted to the top opening of the third reactor 3. Each of the first cover plate 4, second cover plate 5, and third cover plate 6 has a through hole for bolt penetration. The top openings of the first reactor 1, second reactor 2, and third reactor 3 are also provided with... A through hole for the bolt is provided, and a nut is threaded to the end of the bolt. A stirring shaft 8 is rotatably connected to the second cover plate 5. A stirring blade 9 is fixedly connected to the bottom end of the stirring shaft 8. A first solenoid valve 10 is fixedly connected to the bottom surface of the first reactor 1. The first solenoid valve 10 is fixedly connected to the top end of the stirring shaft 8 through a first rotating pipe joint 11. A cavity 12 is provided in the upper part of the stirring shaft 8. The cavity 12 extends into the second reactor 2 and has a connecting hole 13 on its circumference. A second solenoid valve 14 is fixedly connected to the bottom surface of the second reactor 2. The second solenoid valve 14 is rotatably installed to the third cover plate 6 through a second rotating pipe joint 15.
[0029] The first reactor 1 is connected to the second reactor 2 through the first solenoid valve 10, the first rotating pipe joint 11, the cavity 12 and the connecting hole 13. The second reactor 2 is connected to the third reactor 3 through the second solenoid valve 14 and the second rotating pipe joint 15. Thus, the intermediate can be transferred and transported by opening the first solenoid valve 10 and the second solenoid valve 14 without removing the intermediate, making material transfer more convenient.
[0030] An ultrasonic diffuser 7 is fixedly installed on the first cover plate 4.
[0031] The third reactor 3 is provided with a base 18 below it. The bottom of the third reactor 3 is located inside the top of the base 18. A magnetic turntable 16 is rotatably installed inside the top of the base 18. A magnetic rotor 17 is provided inside the third reactor 3. A first motor 19 is fixedly installed inside the bottom of the base 18. The output end of the first motor 19 is fixedly connected to the magnetic turntable 16.
[0032] The bottom of the base 18 has ventilation holes.
[0033] An extension bracket 20 is fixedly connected to the rear side of the second cover plate 5. A second motor 21 is rotatably mounted on the bottom surface of the extension bracket 20. A first synchronous pulley 22 is rotatably mounted on the top surface of the extension bracket 20. The output end of the second motor 21 is fixedly connected to the first synchronous pulley 22. A second synchronous pulley 23 is fixedly connected to the outer side of the stirring shaft 8 corresponding to the first synchronous pulley 22. The second synchronous pulley 23 is connected to the first synchronous pulley 22 via a synchronous belt 24.
[0034] Ultrasonic dispersion is performed in the first reactor 1 by ultrasonic disperser 7, and magnetic rotor 17 is driven by first motor 19 to perform magnetic stirring in the third reactor 3. At the same time, stirring shaft 8 is driven by second motor 21, and stirring blades 9 are used to stir and homogenize the interior of the second reactor 2, thereby carrying out multiple reactions.
[0035] An extension bracket 20 is fixedly connected to the rear side of the first cover plate 4, the second cover plate 5, and the third cover plate 6. Two clamps 25 are symmetrically provided on the outer sides of the first reactor 1, the second reactor 2, and the third reactor 3. Anti-slip pads 26 are fixedly connected to the inner side of each clamp 25. The rear end of the clamp 25 is hinged to the hinge seat 27. The front end of the clamp 25 is fixed by a fixing bolt 28. A nut is threaded onto the end of the fixing bolt 28. A round hole is provided on the clamp 25 for the fixing bolt 28 to pass through. A connecting rod is fixedly connected to the back of the hinge seat 27. 29. A slider 30 is fixedly connected to the end of both the connecting rod 29 and the extension bracket 20. The slider 30 is slidably connected to the matching I-beam column 31. The I-beam column 31 is fixedly connected to the base plate 32. The base 18 is fixedly connected to the top surface of the base plate 32. Limit bolts 33 are threadedly connected to both sides of the slider 30. Threaded holes for threaded connection of the limit bolts 33 are provided on the slider 30. Positioning holes 34 are provided at equal intervals on the I-beam column 31 corresponding to the limit bolts 33. The positioning holes 34 correspond to the limit bolts 33.
[0036] The first cover plate 4, the second cover plate 5, and the third cover plate 6 are connected to the I-beam column 31 via the extension bracket 20. The first reactor 1, the second reactor 2, and the third reactor 3 are fixed by the clamp 25, thereby being stably clamped and fixed by the connecting rod 29 and the I-beam column 31.
[0037] The first cover plate 4, the second cover plate 5, the third cover plate 6, and the clamp 25 are slidably connected to the I-beam column 31 via the slider 30, thereby allowing the position of the first cover plate 4, the second cover plate 5, the third cover plate 6, and the clamp 25 to be adjusted, facilitating the placement and assembly of the first reactor 1, the second reactor 2, and the third reactor 3.
[0038] A discharge valve 35 is fixedly connected to the bottom front side of the third reaction vessel 3.
[0039] The discharge valve 35 facilitates the discharge of the prepared calcium sulfate scale inhibitor from the third reaction vessel 3.
[0040] The top of the first reactor 1 is symmetrically provided with two filling ports 36. The top of the second reactor 2 and the third reactor 3 are each provided with a filling port 36. The end of the filling port 36 is fixedly installed with a blind plate 37 by bolts. Both the filling port 36 and the blind plate 37 are provided with round holes for bolts to pass through. The end of the bolt is threaded with a nut.
[0041] With the addition port 36 and the assembled blind flange 37, raw materials can be easily added to the first reactor 1, the second reactor 2 and the third reactor 3.
[0042] It also includes front-end raw material processing equipment, which includes acid hydrolysis stirred reactor, purification centrifuge, vacuum drying oven and high temperature drying oven.
[0043] It also includes back-end product processing equipment, and back-end raw material processing equipment includes ultrafiltration concentration equipment and drying and shaping equipment. The drying and shaping equipment is either freeze drying equipment or spray drying equipment.
[0044] The ultrasonic disperser 7, the first solenoid valve 10, the second solenoid valve 14, the first motor 19, and the second motor 21 are all electrically connected to the switch 38 via wires. The switch 38 is connected to an external power source.
[0045] The working principle of this utility model is as follows:
[0046] In use, the device is first assembled. The third reactor 3 is placed on the base 18, and the magnetic rotor 17 is placed inside the third reactor 3. Then, the bottom clamp 25 is aligned with the third reactor 3. The corresponding slider 30 is then connected and fixed to the I-beam column 31 by inserting the limiting bolt 33 into the positioning hole 34, thus fixing the position of the clamp 25. The clamp 25 is then locked with the fixing bolt 28, so that the clamp 25 fixes the third reactor 3 through the anti-slip pad 26. At this time, the third cover plate 6 is then placed on the third reactor. On reactor 3, the corresponding slider 30 is fixed with bolts, and then the corresponding I-beam column 31 is connected and fixed by inserting limit bolts 33 into positioning holes 34. The third cover plate 6 is fixed by the cooperation of the extension bracket 20. At this time, the second reactor 2 is placed, and the second solenoid valve 14 is connected to the second rotating pipe joint 15. At this time, the corresponding slider 30 is connected and fixed with the I-beam column 31 by inserting limit bolts 33 into positioning holes 34, so that the position of the corresponding clamp 25 is fixed. The clamp is then fixed with fixing bolts 28. Tighten clamp 25 so that clamp 25 fixes the second reactor 2 through anti-slip pad 26. Then, place the second cover plate 5 on the second reactor 2 and fix it with bolts. Then, connect and fix the corresponding slider 30 to the I-beam column 31 by inserting limit bolt 33 into positioning hole 34. Fix the second cover plate 5 with the cooperation of extension bracket 20. Then, place the first reactor 1 and connect the first solenoid valve 10 to the first rotating pipe joint 11. Then, insert limit bolt 33 into positioning hole 34. The corresponding slider 30 is connected and fixed to the I-beam column 31 in a certain manner, so that the position of the corresponding clamp 25 is fixed. The clamp 25 is locked by the fixing bolt 28, so that the clamp 25 fixes the first reactor 1 by the anti-slip pad 26. At this time, the first cover plate 4 is further placed on the first reactor 1 and fixed by bolts. Then, the corresponding slider 30 is connected and fixed to the I-beam column 31 by inserting the limiting bolt 33 into the positioning hole 34. The first cover plate 4 is fixed by the cooperation of the extension bracket 20, thus completing the combination and fixation of the device.
[0047] This invention is specifically used for the preparation of calcium sulfate scale inhibitors: Wood pulp is stirred in a 5% hydrochloric acid solution in an acid hydrolysis stirred reactor at a constant temperature of 80°C for 2 hours. The reaction is then stopped by dilution. The pulp is further purified by centrifugation and dried in a vacuum drying oven to a moisture content of <5% to obtain nanocellulose (CNF). FeSO4·7H2O is then dried in a high-temperature drying oven under the following conditions: pre-dehydration at 120°C for 12 hours and pulverization to a particle size of <100μm. Hydroxyethylidene diphosphonic acid (HEODP) and polyaspartic acid (PASP) dissolved in deionized water are added to the first reactor 1 through the injection port 36. The mixture is then ultrasonically dispersed for 30 minutes using an ultrasonic disperser 7 with a power of 200W and a frequency of 40kHz. Then, the first solenoid valve 10 is opened, and the first reactor 1 is connected to the second reactor 2 through the first solenoid valve 10, the first rotating pipe joint 11, the cavity 12 and the connecting hole 13, thereby discharging the reactants. The treated nanocellulose (CNF) is then added through the filling port 36 on the second reactor 2. The second motor 21 operates, driving the stirring shaft 8 to rotate through the first synchronous wheel 22, the second synchronous wheel 23 and the synchronous belt 24, thereby driving the stirring blades 9 to rotate, stirring and homogenizing the product in the second reactor 2. The high-speed stirring is 8000 rpm for 15 minutes. At this point, the second solenoid valve 14 is opened, and the second reactor 2 is connected to the third reactor 3 through the second solenoid valve 14 and the second rotating pipe joint 15. The reactants in the second reactor 2 are then discharged into the third reactor 3. Further treated FeSO4·7H2O is added through the filling port 36. The first motor 19 drives the magnetic turntable 16 to rotate, thereby driving the magnetic rotor 17 to rotate for magnetic stirring. Magnetic stirring is continued for 2 hours to ensure complete dissolution of Fe³⁺. Then, the discharge valve 35 is opened, and the product is removed. The product is then concentrated using an ultrafiltration concentrator. The ultrafiltration concentration cutoff is 10 kDa, resulting in a concentrated liquid with a solid content of 30-40%. The concentrated liquid is then dried to obtain a powdered scale inhibitor. The freeze-drying temperature is -50℃, the vacuum degree is 5 Pa, the spray drying inlet air temperature is 180℃, and the outlet air temperature is 80℃.
[0048] The filling port 36 is sealed by the blind flange 27.
[0049] The ratio of hydroxyethylidene diphosphonic acid (HEODP), polyaspartic acid (PASP), nanocellulose (CNF), ferrous sulfate (FeSO4·7H2O), and deionized water is as follows: hydroxyethylidene diphosphonic acid (HEODP) 20-30%, polyaspartic acid (PASP) 15-25%, nanocellulose (CNF) 10-15%, ferrous sulfate (FeSO4·7H2O) 5-10%, and deionized water as the balance. The functional mechanism of hydroxyethylidene diphosphonic acid (HEODP) is to inhibit the polymerization of Ca²⁺ and SO4²⁻ ions. Polyaspartic acid (PASP)... The functional mechanisms are: hydroxyl groups coordinate with calcium ions to chelate hardness ions; nanocellulose (CNF) enhances drug dispersibility and delays sedimentation; ferrous sulfate (FeSO4·7H2O) distorts calcium sulfate crystals through Fe³⁺ doping lattice; and deionized water acts as a solvent. The synergistic mechanism includes chelation-distortion dual inhibition: PASP chelates Ca²⁺, and the Fe³⁺-doped calcium sulfate lattice (distortion rate >20%) double-blocks crystal growth; and steric hindrance effect: nanocellulose forms a three-dimensional network structure, encapsulating Ca²⁺ / SO4²⁻ ion pairs and inhibiting aggregation.
[0050] Compared with existing technologies, calcium sulfate scale inhibitors are more environmentally friendly, with a biodegradability rate >90% (28-day MBR test) and COD emissions <100mg / L. The phosphorus-free formula avoids the risk of eutrophication. It also exhibits high-temperature stability, maintaining a scale inhibition rate of >85% after 200 hours of continuous operation at 80℃ (compared to <60% for traditional agents).
[0051] Application of desulfurization wastewater concentration system
[0052] Operating conditions: CaSO4 concentration 10 g / L, temperature 50℃, pH 7.5, flow rate 1.5 m / s.
[0053] Dosage: 5 mg / L scale inhibitor.
[0054] result:
[0055] The membrane flux decay rate is <5% / 30min, and the flux remains above 95% of the initial value after 6 months of operation.
[0056] The amount of sludge is reduced by 40% (compared to traditional agents).
[0057] Evaporator Crystallizer Applications
[0058] Operating conditions: supersaturation ΔG = 0.6 kcal / mol, temperature 90℃, temperature difference of crystallizer surface 5℃.
[0059] Dosage: 8 mg / L scale inhibitor.
[0060] result:
[0061] The scaling rate is <0.05 g / (m²·h), which is 98% lower than that without the addition of chemicals.
[0062] The cleaning cycle has been extended from 72 hours to 200 hours.
[0063] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A preparation facility of a scale inhibitor special for calcium sulfate, comprising a first reactor (1), a second reactor (2) and a third reactor (3) arranged in sequence from top to bottom, characterized in that: The first reactor (1) is fixedly installed with a first cover plate (4) by bolts at the top opening, the second reactor (2) is fixedly installed with a second cover plate (5) by bolts at the top opening, and the third reactor (3) is fixedly installed with a third cover plate (6) by bolts at the top opening. A stirring shaft (8) is rotatably connected to the second cover plate (5). A stirring blade (9) is fixedly connected to the bottom end of the stirring shaft (8). A first solenoid valve (10) is fixedly connected to the bottom surface of the first reactor (1). The first solenoid valve (10) is fixedly connected to the top end of the stirring shaft (8) through a first rotating pipe joint (11). A cavity (12) is provided in the upper part of the stirring shaft (8). The cavity (12) extends into the second reactor (2) and has a connecting hole (13) on its circumference. A second solenoid valve (14) is fixedly connected to the bottom surface of the second reactor (2). The second solenoid valve (14) is rotatably installed to the third cover plate (6) through a second rotating pipe joint (15).
2. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 1, characterized in that: An ultrasonic diffuser (7) is fixedly installed on the first cover plate (4).
3. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 1, characterized in that: The third reactor (3) is provided with a base (18) below it. The bottom of the third reactor (3) is located on the inner side of the top of the base (18). A magnetic turntable (16) is rotatably installed on the inner side of the top of the base (18). A magnetic rotor (17) is provided inside the third reactor (3). A first motor (19) is fixedly installed on the inner side of the bottom of the base (18). The output end of the first motor (19) is fixedly connected to the magnetic turntable (16).
4. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 3, characterized in that: The bottom of the placement base (18) is provided with heat dissipation holes.
5. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 1, characterized in that: An extension bracket (20) is fixedly connected to the rear side of the second cover plate (5). A second motor (21) is rotatably mounted on the bottom surface of the extension bracket (20). A first synchronous pulley (22) is rotatably mounted on the top surface of the extension bracket (20). The output end of the second motor (21) is fixedly connected to the first synchronous pulley (22). A second synchronous pulley (23) is fixedly connected to the outer side of the stirring shaft (8) corresponding to the first synchronous pulley (22). The second synchronous pulley (23) is connected to the first synchronous pulley (22) via a synchronous belt (24).
6. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 1, characterized in that: An extension bracket (20) is fixedly connected to the rear side of the first cover plate (4), the second cover plate (5), and the third cover plate (6). Two clamps (25) are symmetrically provided on the outer sides of the first reactor (1), the second reactor (2), and the third reactor (3). Anti-slip pads (26) are fixedly connected to the inner side of the clamps (25). The rear end of the clamps (25) is hinged to the hinge seat (27). The front end of the clamps (25) is fixed by a fixing bolt (28). A nut is threaded to the end of the fixing bolt (28). The hinge seat (27) A connecting rod (29) is fixedly connected to the back of the bracket (20). A slider (30) is fixedly connected to the end of both the connecting rod (29) and the extension bracket (20). The slider (30) is slidably connected to the matching I-beam column (31). The I-beam column (31) is fixedly connected to the base plate (32). The base (18) is fixedly connected to the top surface of the base plate (32). Limit bolts (33) are threadedly connected to both sides of the slider (30). Positioning holes (34) are opened at equal intervals on the I-beam column (31) corresponding to the limit bolts (33).
7. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 1, characterized in that: The bottom front side of the third reactor (3) is fixedly connected to a discharge valve (35).
8. The preparation facility for a calcium sulfate-specific scale inhibitor according to claim 1, characterized in that: The first reactor (1) has two symmetrical filling ports (36) on its top. The second reactor (2) and the third reactor (3) each have a filling port (36) on their tops. The ends of the filling ports (36) are fixed with blind plates (37) by bolts.